1261426706 has 8 divisors (see below), whose sum is σ = 1900625664. Its totient is φ = 627884820.

The previous prime is 1261426687. The next prime is 1261426711. The reversal of 1261426706 is 6076241621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1261426706² = 3182394669220020872, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1413710 + ... + 1414601.

It is an arithmetic number, because the mean of its divisors is an integer number (237578208).

Almost surely, 2^1261426706 is an apocalyptic number.

1261426706 is a deficient number, since it is larger than the sum of its proper divisors (639198958).

1261426706 is a wasteful number, since it uses less digits than its factorization.

1261426706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2828536.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 1261426706 is about 35516.5694570858. The cubic root of 1261426706 is about 1080.4898058342.

The spelling of 1261426706 in words is "one billion, two hundred sixty-one million, four hundred twenty-six thousand, seven hundred six".